Is it posible generate with scrypt "virtual" test transaction to real publick key(empty, without money any old publick key for ex) and get valid r,s,z for this transaction and this real publick key ?
Transactions
to a public key (so a P2PKH transaction), where this "real" public key is on the receiving end will not make any difference. You need signatures made by the corresponding private key and those will obviously only occur whenever an outgoing transaction is made for the lattice attack.
If you want to have some more info on how this kind of attack works read this study called "Biased Nonce Sense: Lattice Attacks against
Weak ECDSA Signatures in Cryptocurrencies". PDF here ->
https://eprint.iacr.org/2019/023.pdf